Colorado Springs Paranormal Association investigating Gold Camp Road tunnels. We had odd pulsing responses from our K-2 meter from time to time; however, we could not replicate it and could not explain why it went off randomly in various locations. We thought maybe power lines or some kind of interference, but we could not duplicate it on demand or by standing in a particular area or location each and every time. We know walkie talkies make K-2 meters go off as well, but none were in use at this time.